Find a ? b.a = ,  b = 

A.
B. -9
C.
D. 63

Answer: B

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A.
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C.  
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A. 40.0028 B. 39.9028 C. 39.4028 D. 40.0972

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A. sec ? B. 1 C. cos ? + sin ? D. sin2 ?

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